The River Thames was declared ‘biologically dead’ 60 years ago. Now it’s making a comeback Posted on November 11, 2021 by roilaohe Declared “biologically dead” in 1957, the River Thames is again home to seals, seahorses and certain kinds of birds, according to a report. The River Thames was declared ‘biologically dead’ 60 years ago. Now it’s making a comeback Share this:TwitterFacebookLike Loading... Related